Footnote appears on previous page, Why?

Question

My MWE part,

\documentclass[a4paper,11pt,notitlepage]{report}

\usepackage{lipsum}
\usepackage[turkish]{babel}
\usepackage{color}
\usepackage[left=2cm,right=2cm,top=2.5cm,bottom=2.5cm]{geometry}
\usepackage{multicol}
\usepackage{dblfnote}

\renewcommand\thefootnote{\textcolor{red}{\arabic{footnote}}}

\begin{document}
\begin{multicols}{2}

\lipsum

\vfill
\columnbreak

\section{\textit{Project}}
\begin{itemize}
\item W\footnote{Watt}
\item SMPS\footnote{Switch Mode Power Supply}
\item A\footnote{Ampere}
\item Footnote appears on previous page.
\end{itemize}

\end{multicols}
\end{document}

and displaying

Where did I do wrong? How is it changing or adding in my MWE?

Answer 1

The document produces the warning

Package multicol Warning: I moved some lines to the next page.
(multicol)                Footnotes on page 1 might be wrong on input line 26.

multicol can detect that it has happened but can not go back to fix it.

You can force a page break with the correct footnotes:

\documentclass[a4paper,11pt,notitlepage]{report}

\usepackage{lipsum}
\usepackage[turkish]{babel}
\usepackage{color}
\usepackage[left=2cm,right=2cm,top=2.5cm,bottom=2.5cm]{geometry}
\usepackage{multicol}
\usepackage{dblfnote}

\renewcommand\thefootnote{\textcolor{red}{\arabic{footnote}}}

\begin{document}
\begin{multicols}{2}

\lipsum

\vfill
\end{multicols}
\clearpage
\begin{multicols}{2}
\section{\textit{Project}}
\begin{itemize}
\item W\footnote{Watt}
\item SMPS\footnote{Switch Mode Power Supply}
\item A\footnote{Ampere}
\item Footnote appears on previous page.
\end{itemize}

\end{multicols}
\end{document}